Educational device



Aug. 24 1926. 1,597,177 A 7 R. .LBRowN EDUCATIONAL pgn/ICE Filed Nov. 144 1925 '2 'Sheets-Sheet l gjm/vento@ attain,

Aug. 24 1926. 1,597,177 n R. J. BROWN EDUCATIONAL DEVICE L Filed Nov. 14. 1.925Y 2 sheetsfsheet 2 Patented Aug. 24, 1926.

y UNITED' STATES 1,597,171 PATE Nr orner.

ROBERT a. nnowu. or BEAUMONT, `TEXAS]Assrsnoa oronnnrirr` To Jenn i, nnAMs, OFOKLAHOMAOITY, OKLAHOMA; f

EDUCATIONAL DEVICE.

Application filed November 14,1925. Serial No. SEL-04:11u`

The device relates to educational devices and has for its object to provide an educational. device particularly adapted for use in schools and constructed whereby anwocuiar 5 demonstration can be given `of the. movement of the earth on it axis and simultaneously in its orbit for illustrating the` movement of the earth.

A further object-is to provide a horizon- J tally disposed frame having an upwardly ein tendine' aaertured iiange ud'acent itsouter t) nl i edge, a centrally disposed rotatable shaft having a worm gear at its lower end and fr sprocket at its upper end and which sprocket is provided with a sprocket chain which er# tends around a vertically disposed saaft rotatably mountedin a sleeve, the upper end of which terminates in an angular portion and which sprocket and sprocket chain rotate the last named shaft and the globe carried lby the angle portion of the shaft for simulating the rotation of a globe on the angular portion of the shaft on its axis in relation to a light disposed centrally of the device. Also to provide an arm pivoted centrally of the device and connected to a sleeve in which the globe carrying `shaft `is rotatably` mounted and the arm with a vertically disposed shaft, the lower end of which is 3D provided with` a gear, the teeth of which engage in the apertures of the apertured flange and the upper end of which shaft is provided `with a gear which meshes with a smaller gear carried by the globe supporting shaft and which has a gear connection with the globe whereby upon a rotation of the arm for moving the globe in its orbit andthe axis, said globe will be simultaneously ro.- tatedto assume proper positions in relation to theA light centrally of the device, and which light represents the sun.

A further object is to provide an operating shaft below the frameof the device, and which shaft is provided with a wormjwhich meshes with the worm gear and forms means whereby the device may be operated.

lith the aboveand other objects in view the invention resides in the combination and arrangement of parts fas hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

.lin the drawings Figure 1 is atop plan view of the device. Figure 2 isa vertical longitudinal sectional view throtuh the device.

Figure 3 is a horizontal sectional view through the apertured flange showing the gearmmeshingtherewith. i

Figure 11 is an enlarget detail view of the apertured flange.

Figure 5 isa vertical longitudinal sectional view through the outer end of the pivoted arm of the adjacent mechanism.

Referring to the drawing the numeral 1 designates a substantially horizontally disposed dished plate which may be stamped from a single piece of metal, and which. plate is provided with an annular shoulder 2, towhich may be secured by welding, an annular` horizontally disposed apertured rack 3, in the apertures l off are adapted to be received. The plate 1 is provided with an outwardly extending flange 5, to the under side of which are secured downwardly `extending supporting legs 6, adapted to rest on a support for supporting the device. Rotatably mounted in an upwardly struck portion 6 of the plate 1, and a dished plate 7 secured to the under side of the plate 1 is a sleeve 8, to the lower end of which is secured a worm gear 9, with which a worm 1G meshes, and which worm is carried by anoutwardly extending Operating shaft 1l, the outer end of which is provided with a crank 12 adapted to be grasped by an operator when it is desired to rotate the gear 9. The upper end of the sleeve 8 above the plate 1 is provided with a sprocket 13, and around which sprocket and a sprocket 141, a sprocket chain 15 extends. The sprocketla is secured to a vertically disposed shaft 1G which is rotatably mounted in a sleeve 17, carried by the .pivoted arm` 18. The upper end of the shaft 1G is provided with an angularly disposed portion 19, which is inclined at about twenty-three and one-half degrees, at which angle the earthrsets in relation to the sun. y

The inner end ofthe arm 1S is rotatably mounted at 2O on the` upper end of ashaft 21, and which shaft is supported at its lower end by a bracket 22 carried by the side of the plate 1, and on the upper end of which shaft 21 a conventional form of lamp 23 is disposed which represents the sun, and

around which lamp the globe 24. carried by whichugear teeth Uil under VEl',

the angular portion 19 of the shaft 15 is revolved and simultaneously revolves on its axis for Vsimulating'the position of the earth in relation to the sun during its movement in its orbit. lotatably mounted in a sleeve carried by the arm 18 is a vertically disn` posed shaft Q6, Vand the lower end of which shaft is provided vwith a gear 27, the teeth of which mesh withl theapertures d ofthe rack during the rotation ,of the sleeve 8 and the arm 18, therefore it will be seen that asthe earth 2li is moved in its orbit the shaft 26 will'be simultaneously rotated, however it will be seentliat it will be necessary to not Vonly nio Jetheglobe 2i in its orbit and rotate the shaft 16, but also to rotate the globe on its the above `*result the axis. 'lov accomplish 26 is provide-d vwith a upper end of the shaft gear which meshes with a gear 30 carried by sleeve 31, which is rotatably mounted on the upper 'end of the shaft 16. Sleeve at'its upper end is provided with a toothed disc 32, which meshes with a Vtoothed dise-V '33 carried by the globe at one of its poles,

therefore it will be seentliat the globe 2li will be simultaneously moved in its orbit,

'rotated on its anis and its axis shifted in relation to the lamp 23 and the globe moved to simulateV the different positions of the earth at various seasons according to its position in relation tothe sun. The ratio of the gear 27 and the annular rack 3 is such that when the shaft 16 maires a complete planetary movement the globe 2st will be causedto make-three hundred and sixty five rotations, representing the number of days inja year. 1Rotatably mounted in bearings the arm 18 and the sleeve 25 is a roller 35, which roller engages f the upper side'of'the plate 1 and supports the Yarm 18 during its rotation thereby insuring an easy steady movement ofthe arm during its rotation and eliminating binding or vibration.

From the above it will be seen that an educational device is provided whereby stu dents may be given-an ocular demonstration of the movement of theA earth on its axis and in its orbit, and in a manner whereby it is easily remembered, and can be clearly understood.

The invention having lbeen set forth what is claimed as new and usefuliss- 1. An educational device for simulating the-movement of the earth, saiddevice coinprisiiig a base, a vertically disposed sleeve,

' rotatably mounted in the base, means for rotating said sleeve, a radially disposed arm'I carried by the upper end ofi the sleeve, a verlasse, a support snaft and meshing with the annular last named shaft, said gear meshing with a gear carried by the first Ymentioned shaft ,and rotatably mounted thereon, said first mentioned shaft beingprovided with an angularly disposed portion, a globe rotatably ii'iounted on saidangularly disposed portion and gear connections between the globe and the last named shaft.

,2. An educational` device for simulating the movement ofthe earth comprising a base, a sleeve rotatably mounted in Ysaid extending through the sleeve,

a lamp carried by the support above the `sljeeve,'nieansfor rotating said sleeve, a radially disposed arm carried by the sleeve and extending towai'ds'one side of the base, a vertically disposed outer shaft'carried by he end of the arm, driving connections between the outer shaft and the sleeve, an angularly disposed portioncarried by the upper end of the outer shaft, a globe rotatably mounted on the angularly disposed portion, an inner shaft, gear connections between the inner shaft and the globeranzannular rack carried'by the base and vgear connections between the inner shaft `and 'the annular rack. Y y

3. An educational device for-simulating the movement of the earth comprising a base, a stationary support extending through Y sleeve and extending towards one sideof the base,'a vertically disposed outer shaft carried by the end of the arm, driving connec-V tions between the outer shaft and the sleeve, an angularly disposed portion `Acarried by the upper'end of the outerisliaft, a globe rotatably mounted on the angularly disposed portion, an inner shaft, gear connections be-' tween the .inner shaft and the globe, an Vannular rack carried by thebase, gear 'connections betweenthe inner` shaft and the annular raclr and a supportingv Wheel carried by the arm and engaging the base.

In testimony whereof l have signed my name' to this specification.

sonner J., BROWN., 

